DAYS360 (date1,date2,method)
@date1 @date2 360- , 30- .
@method = true (), . , 31 , 30.
@method = false () , US. .
, Gnumeric , .
Excel.
DAYS360(DATE(2003, 2, 3), DATE(2007, 4, 2)) 1499.
MONTH, TIME, NOW, YEAR.